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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2021-05-21 13:21:01 +0200 |
|---|---|---|
| committer | Pavel Machek <pavel@ucw.cz> | 2021-06-24 00:55:28 +0200 |
| commit | ee78b9360e14c276f5ceaa4a0d06f790f04ccdad (patch) | |
| tree | 92a09f0454301b93c14fa6c43dfc606a28058755 /drivers/leds | |
| parent | 96a30960a2c5246c8ffebe8a3c9031f9df094d97 (diff) | |
| download | linux-ee78b9360e14c276f5ceaa4a0d06f790f04ccdad.tar.gz linux-ee78b9360e14c276f5ceaa4a0d06f790f04ccdad.tar.bz2 linux-ee78b9360e14c276f5ceaa4a0d06f790f04ccdad.zip | |
leds: ktd2692: Fix an error handling path
In 'ktd2692_parse_dt()', if an error occurs after a successful
'regulator_enable()' call, we should call 'regulator_enable()'.
This is the same in 'ktd2692_probe()', if an error occurs after a
successful 'ktd2692_parse_dt()' call.
Instead of adding 'regulator_enable()' in several places, implement a
resource managed solution and simplify the remove function accordingly.
Fixes: b7da8c5c725c ("leds: Add ktd2692 flash LED driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/leds-ktd2692.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/leds/leds-ktd2692.c b/drivers/leds/leds-ktd2692.c index 632f10db4b3f..f341da1503a4 100644 --- a/drivers/leds/leds-ktd2692.c +++ b/drivers/leds/leds-ktd2692.c @@ -256,6 +256,17 @@ static void ktd2692_setup(struct ktd2692_context *led) | KTD2692_REG_FLASH_CURRENT_BASE); } +static void regulator_disable_action(void *_data) +{ + struct device *dev = _data; + struct ktd2692_context *led = dev_get_drvdata(dev); + int ret; + + ret = regulator_disable(led->regulator); + if (ret) + dev_err(dev, "Failed to disable supply: %d\n", ret); +} + static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev, struct ktd2692_led_config_data *cfg) { @@ -286,8 +297,14 @@ static int ktd2692_parse_dt(struct ktd2692_context *led, struct device *dev, if (led->regulator) { ret = regulator_enable(led->regulator); - if (ret) + if (ret) { dev_err(dev, "Failed to enable supply: %d\n", ret); + } else { + ret = devm_add_action_or_reset(dev, + regulator_disable_action, dev); + if (ret) + return ret; + } } child_node = of_get_next_available_child(np, NULL); @@ -377,17 +394,9 @@ static int ktd2692_probe(struct platform_device *pdev) static int ktd2692_remove(struct platform_device *pdev) { struct ktd2692_context *led = platform_get_drvdata(pdev); - int ret; led_classdev_flash_unregister(&led->fled_cdev); - if (led->regulator) { - ret = regulator_disable(led->regulator); - if (ret) - dev_err(&pdev->dev, - "Failed to disable supply: %d\n", ret); - } - mutex_destroy(&led->lock); return 0; |